Oil fuel burner and supply apparatus therefor



May 16, 1933. i, LUBBOCK ET AL on.. FUEL BURNER AND SUPPLYAPRARATVUSTHEREFOR 2 Sheets-Sheet l Filed Feb. 12, 1930 May 16 1933 l.LUBBOCK Er AL 1,909,294

OIL FUEL BURNER AND SUPPLY APPARATUS THEREFOR Filed Feb. 12, 1930 2Sheets-Sheet 2 '10 oilw 5 Another feature hama Mq 1s, 1933 UNITEDs'rA'rEs PATENT ort-lcs :um Lunocx un somt ausm Joven, or 'minion ausm,assreuons 'ro 'ma mno oonrm, or Lennon.

ENGLAND on. run. amm m aum'z .arrana'rua era Applicatinjled lsbrnry 12,1,30. lerlal 10.48B, and in Great Britain leptember 5, 1989.

This invention relates to improvements in oil fuel burners and sup lyapparatus therefor, and is more partie arly concerned with automaticburners (i. e., burners in which 8 ignition is intermittent).

One object of the present invention is to provide an arrangement wherebyoil is maintained heated even when the burner is shut down vand wherebthe minute quantities of h'ch are to ignited are maintained heated so asto be susceptible to ignition.

A further object of the invention is to provide an arrangement'wherebythe elec-A trodes of an electric spark igniter are pre- 13 vented fromcarbonizing.

According to the present invention a chamber is provided within the bodyof an oilfuel burner having inlet and outlet openings connected to orada ted to be connected 90 to a heated oil supply2 t e arrangement beingsuch that oil can circulate from the supply to the chamber and back tothe sup ly, the oil required for burning bein supp ied to the jet of theburner from sai chamber. of the invention is the provision ofa valve(whichv may be automaticall actuated according to the su ply pressurefor controlling the flow of oil om the chamber to the iet and theemployment of this valvez to actuate an air regulator and/or to ac uatea device for cleaning or wiping the electrodes of an electric igniterfor the iet. 5

According to a further feature of the invention, the oil supplyapparatus comprises a reservoir provided with a leak device whichenables any water and sediment to drain awa from the bottom of thereservoir.

ith these and other objects in view, which 9 will become apparent inYthe detailed description below, the invention consists in the comination and arrangement of elements as set forth in the fo lowingdescription,

claimed in the claims and shown in the rawa ings, in which vFi ure 1 isa side oelevational view with certam parts cut away for greaterclearness;

Figure 2 is a front elevational view;

Figure. 3 is a vertical cross sectional view showing the burnerlconstruction particulaly;

i re 4 isa cross sectional view of the relie valve, and

Figure 5 is a vertical cross sectional view of a modified burnerconstruction.

1 is a burner jet body having a passage 2 formed in a boss 3, thepassage 2 lopening to discs 4, having orifices arranged to impart awhirling motion to the fuel forced thereto. 6 is an annular chamberwhich is formed between the boss 3 and inner periphery of the jet bodyI, and opens into an oil intake chamber 7, to which oil is suppliedthrough a pipe 8 which communicates with an oil fuel reservoir 9 locatedas near as Ipossible to the burner. Located in the reservoir are anelectrical immersion heater 10 and an immersion. controlling thermostat11. The annular chamber 6 is connected by a second pipe 12 to thereservoir at a lower point than the ipe 8.

T us the arrangement is such that the oil can circulate from thereservoir 9 to the intake chamber 7 and annular passage 6, and thenceback to the reservoir 9, the circulation being set up by thethermo-Siphon action due to the heating of the oil in the reservoir.

By this means the heat of the oil is con-` served up to a point closelyadiacent the jet, on account of thermo-siphemc circulation whichprovides an annulus of heated oil surrounding thev central supplypassage 6. By this means, even if the burner starts up after a longinactive period, the oil passes to the jet at a temperature such as toensure ignition.

The supply of oil to the discs is regulated by a need e valve 13 whichis` adapted to coo rate with a valve seating formed at the en ofthebossandismountedonastem 9 14 connected to a piston 15 subjected to thepressure of the oil, the piston being urged by a spring 16 in suchdirections as to tend to close the valve seating. Thus, should the oilpressure drop below a' certain value, the passage 2 will automaticall beclosed, and when the pressure again rises, the passage willautomatically be placed into communication with the supply chamber 7.

Oil is supplied under pressure by a pump 17 having an 'intake pipe 18connected to a suitable supply source and having a strainer 19 and adelivery pipe 20. The pipe 20 is connected to a pipe 21 which isconnected to the lower side of the reservoir 9 and is provided with ailter 22 and-pressure gauge 23. rIhe pipe 20 is also connected to abranch 24 which is connected to the source of supply and is providedwith a relief valve 25.

Branched from the pipe 24 is a pipe 26 which communicates with the lowerside of the reservoir 9 through a valve comprising a diaphragm 27 havinga small aperture, the area of which can be regulated by a needle valve28 having a conical portion 28 adapted, when the valve is closed toextend coinJ pletely through the aperture. By this means a constant leakdevice is provided to prevent the accumulation of water and sediment atthe bottom of the reservoir, due to the heating of the oil within thereservoir.

Moreover, any impurities which become seated around the aperture areremoved` by the conical portion.

The fuel issuing from the burner is ignited by an electric spark whichforms between two electrodes 29, 30, carried by supports 31 secured to acylindrical open-ended casing 32 1n which the burner is located, theelectrodes ing supplied with current through leads of which only one,indicated at 33, is shown. In order to clean the electrodes, a wiper 34,pivotally mounted at 35, is connected by an adJustable link 36 pivotallyconnected to an arm 37 secured to the rod 14, whereby, when the piston15 is caused to move either to open or to close the needle valve 13, thewiper is caused-to move between the electrodes 29, 30 and to clean them.By this means any ossibility of nongnition, due to dirty e ec.

trodes, is avoid The casing 32 constitutes an air su ply conduit, theair being forced through the casing by a blower 38 driven by the shaftwhich drives the oil pump 17. Located within the casing 32 is an airregulating vane 39, pivotally mounted at 40 and biased to move by aweight 41 to its closed position. To* an eccentric pin on the Avane isconnected one end of a link 42 whose other end is pivotally connected tothe rear end of the rod 14. Thus, the supply .oflair is automaticallycontrolled by the movement of the piston 15, the arrangement being suchthat when the piston 15 is in its forward position (i. e. when the valve13 is closed), `the vane cuts of the air' Supply- In the modificationshown in Figure 5, the electrode wiper 34 is reciprocated between theelectrodes instead of being rocked as in the arrangement shown in Figure3, thewiper being slidably mounted in guides 43 secured to the body ofthe burner. In this modification also, the rod 14 is replaced by a shortrod 44 which terminates at and is secured to the front of the piston 15,while the arm 37 is secured to a plug v45"olosing the end of the piston.

The relief valve 25 comprises, as is shown in Figure 4, the casing 46having passages 47, 48 in communication respectively with the pressuresupply from the pump and with the reservoir. Located within the casing46 is a liner 49 slidably mounted within which is a piston valve 50whose lower end is adapted to seat against a disc 51 having a port 52.IThe liner is formed with a slot 49 in register with the passage 48. Theupper end of the chamber 46 is closed by a plug 53 between which and ailange 54 on the liner 49 is interposed a spring 55 which forcestheliner into position.

The chamber formed between the upper end of the piston 50 and the innersurface of the plug 53 is placed into communication with the passage 48by a passage 56, whereby any oil which leaks between the piston 50 andthe liner 49, and between the liner 49 and the casing 46, and passing tothe chamber, passes down the passage 56 and thence returns to thereservoir.

The piston 50 is hollow to receive a spring 57 which tends to move it toits closed position, and the spring is interposed between the bottom ofthe hollow piston and a shoulder formed on a guide 58 whose upperend isshaped to receive the rounded end of an adjusting screw 59 mounted inthe plug 53. 'Ihe projecting end of the screw 59 is covered by a cap 60screwed onto the plug 53.

Having now particularly described and ascertained the nature of our saidinvention and in what manner thel same is to be performed, we declarethat what we claim is: i

1. In an oil uel burner, the combination of a member responsive tovariations in the pressure of the oil fed to the burner, electrodes forigniting the oil issuing from the burner, an electrode wiper, and meansconnecting said pressure responsive membento said electrode wiper. ,Y

2. The combination with a burner as claimed in claim 1 of a valve forregulating the supply of oil to the burner, and means connecting saidpressure responsive member tothe valve.

said Wi er adapted to be moved between said 3. An oil fuel burner asclaimed in claim 1,

connected to 5 surrounding vane located said wiper and to said pressureburner as nded casin the burner2 a pivotally mounte vwithin sald casingand a. 'nk

ination with a.

connected to Asaid vane and to said pressureres onsive member.

testimony whereof we have signed our 10 names to this specification.

ISAAC LUBBOCK. JOHN RUSKIN JOYCE.

